RE: When is it to late to plant a food plot?
I would like to point out that you should plant according to your area. There is a lot of difference in between one area and another. In VA the eastern part of the state has hardly any frost concerns, but the western mountains get frost by October.
So, with brassicas and clover you want at least 45 days of growth before the first frost. Ask a local farmer or the FSA office personnel what the historic first frost date is and subtract 45 days from that and you will probably be safe; however, Mother Nature can always throw us a curve. Good Luck!